Radio apparatus



Nov. 14, 1933. J. Q. @AUBERT 1,935,355

RADIO APPARATUS 11111111111111111111111111111111111111111111111111111111111 11 11 11 11 11 l1 1l1 11 1111 '1 11 11 11 1| 1| 11 11 111 111 111 111 11 11 11 11| 11 111 |1111 1111111111111111111111111111111111111111 1111111111111111111111111111111111111111111111111 111111111111111111111111111111111111111 1 11111111m1111111111114111111111111111111111-11111111111111111111111111111111111 11 1111111111111111111111111111111 1111111111111111111111111111111111111111 111111111111111111111111111111111111111111 1 11111111111111111111111111111111111111111111111111111111111111111111111111111 111111111111111111111111111111111111111111 l 27 1 111111111111111111111111111111111111 1111111111111111111111111111111111111111111 11111111111111m1111111111111111111111111 1 1 1 11111111111111'1111i'11'1111111111111 1111m111r11111T1111111m111111111-111111111 1-111111111111rn11111111n1111111111111 l111| 11111 11111111 1111111 11111 111111 1 1111111111111 1 1 11111111111111111111111111111 1 11111 1 1111 11 11 1111 11 111111 11111 1 1| 11111 11111111111111111 11111111 1111 11111111111111111111111111111111 1111111 1111 111111111111 1 111 111111 11111l 11 1 1 1 1 111111111111111111111111111111111111111111111111111111111111111111 1 L1 11 LL11 11 1 1 11 11 1L 11 11 11 1 1 1 11 11 1 |1 1.1 11 1L l11 11 1. 11.L1 .1 1 11.111

1 1 111 23 '11 1 gV 1/`/ 11 11 1 l 1| II INVENToR ATTORNEYS J. Q. GAUBERT RADIO'APPARATUS Nov. 14. 1933.

Filed March 9. 1931 2 Sheets-Sheet 2 INVENTOR Patented Nov. 14, '11933 raisl PATE . RADIO APPARATUS l Y l John Quincy Gaubert, Dayton, Ohio, .assignon by mesne assignments, to Radio .Corporation ,of America, New York, N. Y., a corporation of Delaware ApplicationMarch 9, 1931. Serial No'. 521,101

3 Claims. (Cl. 74-7) This invention relates to radio apparatus and particularly to the driving connections between a control shaft and a tuning shaft, or other driven shafts. Y

A One of the objects of the invention is to'pro- -vide a smooth, noiseless and vefficient driving connection between a control shaft and a driven shaft.

Another object of the invention is to provide a simple and efficient speed reducing drive between a control shaft and a mechanism to be operated thereby. A

vA further object ofthe vinvention is to provide a driving connection between a control shaft'and a driven part, in which manipulation of the con-v 'trol shaft beyond the limit of rotation ofthe movable part will not injure the parts of the mechanism so connected.

Further objects and advantages ofthe present invention' will be apparentu from the following description, reference being had to the accompanying drawings wherein a preferred embodiment of one form of the present inventionV isv clearly shown.

In the drawings: y y Fig. 1 is a view'in elevation with a fragmentary detail illustratingv the instant invention.

Fig. 2 is a sectional View substantially as ind icatedby the'line and 'arrows 2 2 of Fig'. 1.

Fig. 3 is a View of the mechanism substantially as indicated by the line and arrows 3--3 of Fig. 1. Fig. 4 is a front elevational viewsubstantially as indicated by the arrow 4 of Fig. 1. Fig. 5 is a transverse sectional view througha portion of the devcesubstantially as indicated bythe line 'and arrows 5 5 of Fig. `4.

Een

Fig. 6 is a sectional View of theinstant inven tion. illustrating certain portions thereof in modification, the section being illustrated substantially by theiline and arrows 6 6 of Fig. 4.

With particular reference to the drawings, the drive mechanism has beenr illustrated as applied to a tuning unit 'of a radio apparatus, diagrammatically illustrated as a Ybank, 'of condensers, but it is obviousthatjthe drivermay full well be applied to anywform of tuning device, or to any form of rotatable mechanism 'whether or i not it be strictly a tuning mechanism. With this in mind the description will proceed, in that a mechanism 20 having a rotatable shaft 21`is provided with a driving disc 22, the mechanism 20 being secured to a base 23 byvscrews, bolts, etc. 23a, and to which base is also fixed a bracket 24 having a pair of parallelly extending legs 25 and 26. The leg 26 of the bracket may if desired,

provide abearing or support for the lend. of the shaftvj21 near the disc 22 as at 2'7, and it is preferred that the braoketfbe securedto the base 23'- as by `screws 28. A convenient form of the bracket as it is to be used in'production, conforms to what is known as a LIV-shaped or J- shaped bracket, inrwhich the bridge portion' 24` is secured to the baserand the opposite legs 25 and 26 appear as illustrated inffFig.` 1.l f

Each of thelegs 25'anld 26 of the bracket provides a bearing means for a control shaft 40, the leg 2 5 providing a spherical depression or recess formed by the tubularsquirt lor extension `29` while the leg 26A is provided with a notch 3Q running from the bridge portion 24 for a substantial distance up vthe leg 26. ',The notch 30 is carried overthe bend of the bracket'joining they leg 26 Awith the,V bridge 24 and ends in the arc like aperture'31 in the bridge portion 24, the reason for which will Vappear.presently. A slidable member 32 is grooved appropriately to pass through the aperture 31 and' along'the slot 30, so that-they flanges 33 onjeach-side of the groove will act asv keepers to' retain the slide within theslot 30. The aperture 31 includes lateral notches 34 at' the juncture of the slot 30 that permit the flanges 33 to pass through the base 24. This kblock I3,2 is provided with 'abore 35 within which is journalled the shaft 40 and the shaft 40 carries a collar 36 of complementary surface to properly mate with the semi-spherical squirt29 hereinbefore described.` A i These provisions of the squirtv29 andmof thev collar 36 make for a ball and socket connection between the control shaft 40 and the bearing ing a certain amount of oscillation of the control shaft without the least injury to the parts thereof, or in any way binding of the rotating parts.

-' To secure the collar36 upon the shaft 40,y it has NT OFFICE.:

sol f 90 provided by the leg 25 of the bracket; thus allowi substantially as indicated in Fig. 5. On the control shaft 40 there is a driving pinion 45 that may be secured by a set screw 46, and that in all events provides anannulargroove of undercut form', as k is illustrated at 47 infFigs. 1, ,3, 5 and 6. This undercut groove 4'? provides lan inclined wall or 105 camming surface 48, that is presented for engagement with the drivingdisc with which it is to be coupled, substantially as indicated in Figs. 1, 3 and 6.

It is thus seen that the controll shaft and its 1 ,10

assembly of collar 36, slidable bearing 32 and driving pinion 45, may be assembled in a jig placing the members 36 and 45 in proper spaced relation, with the slide 32 interposed somewhere between and sliding upon the shaft 40, at which time the pinion 45 may be secured to the shaft 40, all of 'which makes for rapid assembly of the structure. When assembling the control shaft with its appertinent members in the bracket 24, it is only necessary to slide the block 32 against the collar 36 then pass the end of the .shaft 40 with the parts 32 and 36 thus juxtaposed through the aperture 3l and notches 34 of the bracket 24 so that the slide 32 will match up with the slides of the notch 30 acting as'a retainer therefor, thence sliding the assembly laterally through the base and along the notch until the shaft 40 comes into substantial alignment with the squirt 29, when the shaft 40 may be pushed endwise so as to seat the collar 36 in the semispherical depression 29. After so much has been accomplished, the supporting member has a spring that is placed against the block 32 and vdisposed within the notch 30 beneath the blockY 32 substantially as illustrated Figs. 1, 2, 3 and 4, and the bracket is thence secured to the base 23 by the screws 28.

This will position the pinion 45 in substantial registry with they edge of the disc 22 so that the groove 47 will receive the peripheral edge of the disc 22 as illustrated in Fig. 1. The spring 50 has beenrcalibrated so that it will continually urge the pinion 45 upwardly or to a point. beyond strict alignment with the bearing squirt 29, thus urging the pinion 45 into engagement with the disc 22. The inclined or camming surface -46 engaging the corner of the disc, by means of the spring 50-tends to cant the edge of the disc against the opposite sharpened edge 51 of the groove 47, so that there is frictional engagement'between the disc 22 and the pinion 45 at the contacting portions. The engagement thus provided makes for a positive frictional engagement of even tension between the pinion 45 and the disc 22, so` that turning of the control shaft 40 produces a smooth and Vunobstructed rotation of the shaft 21 at all points between its limits of rotation. Upon continued rotation of the control shaft after the driven shaft has been rotated against Y its stop, no harm is done to the driving mechanism, .since slipping will then ensue between the disc and pinion, thus saving the driving mechanism from rupture. In a driving connection of this type, no attention need be given to the strict alignment of parts, such as the shafts 21 and 40, as has heretofore been necessary. The driving engagement between the portions 48 and 51 of the pinion 40 and the disc 22 is infallibly maintained through the engaging portions of the members 45, 5l and 22 and will respond to any degree of misalignment or wear.

It is by no means essential that the spring of the helical form illustrated at 5U be used in the instant invention but one of the bowed or leaf spring type as 60 disclosed in Fig. 6 may be used and in some instances be preferred. In that instance .each end of thespring 60 is particularly fashioned so as to make substantial seating engagement with respect to the base 24 and the block 32. This is accomplished by rolling over the eXtreme end of a spring at 61, so as to provide a lug that seats in the lateral notches 34 of the aperture 31 in the bridge portion 24 of the bracket. No additional provisions are necessary with regard to the bracket for this adaptation, since the lateral notches v34are a necessary part of the aperture 31 that provides for the .passage of the flanges 33 through the bracket base when the block 32 is assembled therewith. The other end of the spring 60 is flared outwardly at 63 so as to seat within a notch or recess 64 on the under side of the block 32, and thus acts as a confining means for the spring and tends to locate it in correct position. In the rst described form the knotch 64 on the underside of the block 32 is used for seating the upper end of the spring 50 in a similar manner.

While the form of embodiment of the present invention as herein disclosed, constitutes a preferred form, it is to be understood that other forms might be adopted, all coming within the` scope of the 4claims' which follow.

What is claimed is as follows: Y

1. In a radio apparatus including a slow motion drive for a rotatable shaft, a disc carried by the rotatable shaft, a bracket supporting a control shaft, said bracket providing a socket for a ball and socket bearing for one end of said shaft and a slidable bearing for larsecond p0rtion of said shaft, a driving pinion secured to the control shaft having an undercut armular groove for the reception of the edgeof said driving disc, and means disposedagainst the slid-Y able bearing urging the pinion into engagement, with the said disc whereby the rotation of said control shaft will smoothly drive the disc.

2. In a radio apparatus, means for driving a tuning` shaft comprising in combination, a brack` et supporting one end of said tuning shaft and providing a pair of substantially aligned bearings, one of said bearings comprising a spherical depression, and the other of said bearings cornprising a block slidable within a notch of the said bracket, a control shaft journaled in said slide and providing. a ball like. collar Vfor disposition within said spherical depression, a .drive pinion carried by the control vshaft and provid'- ing a groove with a camming surface, .a disc secured to the tunning shaft having 'its peripheral edge disposed in the groove of said pinion for driving relation therewith, and a spring support for said slidable bearing urging the camming surface of said pinion into engagement with said disc. l i

3. In a driving mechanism for radio appara vtus having a tuning shaft, the combination including, a bracket supporting one end .of the tuning shaft and providing a pair of substantial-f ly aligned bearings, one of said bearings comprising a spherical depression, and the other of said bearings comprising a block slidablewithroo rot

fit

in a notch of the bracket, a control shaft mounti ed in the .bearing of said block and providing a ball like collar for vdisposition within .said spherical depression, Ymeans carried by the control shaft for transmitting motion'to the tuning shaft, and meanscarried by the tuning shaft for engaging said means.

JOHN Q. ('rilUEER'l". 

